PREL - Init the Airplane at Location

Send

Index of aircraft, and the type of start (see enumeration below). Depending on the type of start, additional parameters should be set.:

msg = struct.pack('<4sxii8siiddddd', b'PREL',
                  type_start,             # Integer: See enumeration below
                  p,                      # 0 -> User aircraft, otherwise 1-19
                  apt_id.encode('utf-8'), # remember to encode string to bytes
                  apt_rwy_idx,            # it's an index, not the runway heading
                  apt_rwy_dir,            # again, an index
                  lat_deg, lon_deg,       # Not needed, if you use apt_id
                  ele_mtr,                # elevation meters
                  psi_tru,                # aircraft heading true
                  spd_msc)                # speed meters per second
sock.sendto(msg, (beacon['ip'], beacon['port']))

The “type of start” is a integer, currently one of:

Enumeration	Int	Meaning
loc_repeat_last	5	used by ATC and reset-flt command
loc_specify_lle	6	used by maps and the like
loc_general_area	7	used to auto-load new airplanes when the number of airplanes is increased
loc_nearest_apt	8	used when we are just loading a new plane, not wanting to change the location in any way, but still starting in a proper manner for the new airplane.
loc_snap_load	9	for when we are getting snapshots from movies and the like, so do not want to reset the flt-path or move the plane!
loc_ram	10	Ramp start
loc_tak	11	Takeoff on runway
loc_vfr	12	VFR app to runway
loc_ifr	13	IFR app to runway
loc_grs	14	Grass strip
loc_drt	15	Dirt strip
loc_grv	16	Gravel strip
loc_wat	17	Seaplane start
loc_pad	18	Helipad start
loc_cat	19	Carrier cat shot
loc_tow	20	Glider - Tow Plane
loc_win	21	Glider - Winch
loc_frm	22	Formation flying
loc_Are	23	Refuel - Boom
loc_Nre	24	Refuel - Basket
loc_drp	25	B52 drop
loc_pig	26	Piggy back with shuttle on top
loc_car	27	Aircraft carrier approach
loc_fri	28	Frigate approach
loc_rig	29	Small oil rig approach
loc_pla	30	Large oil platform approach
loc_fir	31	Forest fire approach
loc_SO1	32	Shuttle stuff
loc_SO2	33	“”
loc_SO3	34	“”
loc_SO4	35	“”
loc_shuttle_glide	36	we don’t access this one except by dropping the shuttle when it is in piggyback

Use the “loc_specify_lle” start type to simply set the lat, lon, and elevation as you like. You can leave the airport info unset in that case.

Use “loc_ram” or “loc_tak” and specify an airport to start at an airport.